NFL Practices: Getting Geeky

Technology Is Changing the Way That Teams Evaluate Players in Practice; Who's Lazy?

Despite workaholic coaches' best efforts, football has always been an inexact science. This time of year, 2½ weeks before the NFL season, teams have 90 players stretched across multiple fields at practice. For coaches, evaluating all that talent has long been part guesswork.

Until now. Here's what's coming to a practice field near you: data. Lots of it. And football will never be the same.